Core Ultra 5 245KF vs Core 2 Extreme QX9650

Primary details

Comparing Core 2 Extreme QX9650 and Core Ultra 5 245KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	168
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	79.32
Market segment	Desktop processor	Desktop processor
Power efficiency	no data	21.16
Architecture codename	Yorkfield (2007−2009)	Arrow Lake-S (2024−2025)
Release date	November 2007 (17 years ago)	24 October 2024 (recently)
Launch price (MSRP)	no data	$294

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core 2 Extreme QX9650 and Core Ultra 5 245KF basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	14 (Tetradeca-Core)
Threads	4	14
Base clock speed	3 GHz	4.2 GHz
Boost clock speed	3 GHz	5.2 GHz
Bus rate	1333 MHz	no data
L1 cache	64K (per core)	112 KB (per core)
L2 cache	12 MB (shared)	3 MB (per core)
L3 cache	0 KB	24 MB (shared)
Chip lithography	45 nm	3 nm
Die size	2x 107 mm2	243 mm2
Maximum case temperature (TCase)	64 °C	no data
Number of transistors	820 million	17,800 million
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Extreme QX9650 and Core Ultra 5 245KF compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1
Socket	LGA775	1851
Power consumption (TDP)	130 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme QX9650 and Core Ultra 5 245KF. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	+	no data

Security technologies

Core 2 Extreme QX9650 and Core Ultra 5 245KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme QX9650 and Core Ultra 5 245KF are enumerated here.

VT-d	no data	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX9650 and Core Ultra 5 245KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Core 2 Extreme QX9650 and Core Ultra 5 245KF.

PCIe version	no data	5.0
PCI Express lanes	no data	20

Pros & cons summary

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Physical cores	4	14
Threads	4	14
Chip lithography	45 nm	3 nm
Power consumption (TDP)	130 Watt	125 Watt

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Should you still have questions on choice between Core 2 Extreme QX9650 and Core Ultra 5 245KF, ask them in Comments section, and we shall answer.

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